Plant Supervisor (RMX)

Career Choices Dewis Gyrfa Ltd; Caerphilly; On-site; GBP 26,000 - 38,000; Full time

Benefits offered by this job

Bonus scheme

Enhanced holiday entitlement

Contributory pension scheme

Access to the Tarmac Reward website

Employee Assistance helpline

Employee Communities

Training and development opportunities

Forces-friendly employer

Job summary

Tarmac is recruiting a Plant Supervisor (Readymix) to lead the RMX team at our Readymix plant near Cardiff. You will manage production, safety, and customer delivery while guiding contractors and staff to meet KPI targets.

The ideal candidate will have RMX experience, strong leadership, and knowledge of Health & Safety policies; IOSH/Safety training is preferred. Roles are days with overtime as production needs.

Qualifications

• Experience supervising RMX operations and teams.
• Strong safety focus with knowledge of risk assessments.
• Willingness to train and implement process improvements.

Responsibilities

• Lead RMX operations on the plant and manage daily production.
• Control costs, manage colleagues and contractors, and meet customer needs.
• Maintain safety, quality, and KPI-driven performance; manage budget.

Skills

Supervisor experience

Health & safety

Readymix knowledge

Education

IOSH Managing Safely (preferred)

NVQ in fixed and mobile plant operations (preferred)

Job description

Meets national minimum wage,Excellent Plus Benefits

Contract Type:

Permanent

Hours:

Full time

Disability Confident:

No

Closing Date:

16/09/2026

About this job

PLANT SUPERVISOR (READYMIX)

• TAFFS WELL Are you an experienced Supervisor looking for a new challenge?

Are you from within a manufacturing, industrial or similar ‘heavy’ industry environment; with exceptional people and customer facing skills?

If this sounds like you then please read on as this could just be the role for you.

We are currently recruiting for a Plant Supervisor

• Readymix to join and lead our fantastic Readymix ‘RMX’ team at our Tarmac Taffs Well Concrete Plant near Cardiff.

As well as Taffs Well and Cardiff this role is easily accessible from Caerphilly, Pontypridd, Porth, Aberdare, Blackwood, Cowbridge, Penarth, Newport, Cwmbran and the surrounding areas.

Due to the nature of the role we are open to accepting applications from candidates who can offer strong supervisory / management experience from within a similar ‘heavy’ industry, as product training will be given to the successful candidate.

Here at Tarmac, we are working hard to create a dynamic and inclusive environment and it’s important that our people come from a variety of different backgrounds.

Main Responsibilities Reporting to the Production Manager the role of Plant Supervisor

• Readymix will manage and be accountable for the RMX operations on our small Readymix / RMX plant.

Safety and operational standards are the fundamentals of the role of Plant Supervisor with cost control, people management of colleagues and Contractors, delivery to customer needs and performance improvement being key.

Managing plant compliance with business policies and procedures and ensuring that legislative compliance is also a strong aspect of the role.

Key Tasks and Responsibilities of the Plant Supervisor

• Readymix: Leading and active supervisory of the RMX operational plant Delivery of toolbox talks
• contractors Manage all aspects of daily production including operational costs and control stocks Efficient manufacture of concrete, controlling standard deviation and cement contents Drive operational performance through KPI’s Timely resolution of queries assigned to the sector Take responsibility for their own safety and that of contractors, customers and business partners Maintain site housekeeping to a high standard Batch concrete to meet customer needs whilst meeting internal quality requirements Responsible for the budget in relation to the plants they are responsible for, these being both fixed and variable costs The role is a DAYS role with overtime available to meet with the Plant’s production needs

The Ideal Candidate The ideal candidate for the role of Plant Supervisor

• Readymix will already have experience in plant operations and preferably within a Ready Mix / Aggregates environment with a working knowledge of production processes.

Suitable candidates for the role of Plant Supervisor

• Readymix will also have: Working knowledge of Health, Safety and Environmental policies Full knowledge of Risk Assessments and Safe System of Work Systems Working knowledge of production processes and Health, Safety and Environmental policies IOSH Managing Safely (preferred but we will train) NVQ in fixed and mobile plant operations (preferred but we will train) Able to actively identify and implement site and process improvements Able to look for opportunities to identify customer needs Strong communication skills and ability to feed opportunities into customer services / sales Confidence to effectively manage change and multitask Evidence good time management skills Enjoy working as part of a team and efficiently motivate others Why Tarmac At Tarmac, ‘who you are’ matters.

We want to get to know you.

We are working hard to create a dynamic and inclusive environment and it’s important that our people come from a variety of different backgrounds.

If you share our values and are proud of a job well done, collaborative in working well with others and ambitious to make things better, then have a read of what we have on offer.

We don't just offer a job, we offer a career.

• Bonus scheme
• Enhanced holiday entitlement
• Contributory pension scheme
• Access to the Tarmac Reward website with discounts on retailers, holidays, etc.

• Access to our Employee Assistance helpline for free and confidential advice
• Access to join our Employee Communities (employee networks) we currently have nine communities inc. (REACH) Religious, Ethnic, Cultural Heritage, LGBTQ+, Parents & carers, Ability, Wellbeing, Female voice and menopause
• Training and development opportunities
• Tarmac is committed to being a Forces‑friendly employer.

We’re proud to be part of CRH, and even prouder to be an equal opportunity employer.

We celebrate diversity and are committed to creating an inclusive environment for everyone.

If you need any reasonable adjustments during the recruitment process, just let us know, we’re here to support you.